The sit-in of West Bengal Chief Minister Mamata Banerjee against CBI's bid to question Kolkata police chief in chit fund scam cases entered third day on Wednesday. The CM has been on the dharna near Metro Channel since the night of February 3.

Meanwhile, the Supreme Court is all set to hear the CBI plea against the Kolkata Police chief in this matter today. On Monday, the apex court had warned of serious consequences if any proof of tampering with evidence was found against the Kolkata Police chief. The case is scheduled to be heard at around 10.30 am.

Demanding evidence, the top court said as quoted in media: "If Kolkata Police Commissioner even remotely thinks of destroying evidence, bring the material before this Court. We will come down so heavily on him that he will regret."

TMC supremo Banerjee embarked on a sit-in Sunday night to protest against the "insults" she faced at the hands of Prime Minister Narendra Modi and BJP chief Amit Shah. She went on the protest hours after a CBI team that had gone to question Kolkata Police Commissioner Rajeev Kumar in connection with chit fund scams was detained in a rare face-off between the police establishments of the Centre and the state.

RJD leader Tejashwi Yadav and DMK leader Kanimozhi met Mamata Banerjee at the stage where she has been sitting on 'Save the Constitution' dharna.

On Monday, the DMK said Stalin spoke to Banerjee over the phone. "DMK President @mkstalin spoke to West Bengal Chief Minister @MamataOfficial over the phone and wished her success in the protest she has been holding since last night," a tweet in Tamil said.

Most of the opposition leaders including Congress President Rahul Gandhi, Chief Ministers of Andhra Pradesh and Delhi, N Chandrababu Naidu and Arvind Kejriwal respectively have backed Banerjee on the issue.